faloker/purify

import { Injectable, CacheInterceptor, ExecutionContext } from '@nestjs/common';
import { CACHE_KEY_METADATA } from '@nestjs/common/cache/cache.constants';

@Injectable()
export class HttpCacheInterceptor extends CacheInterceptor {
  trackBy(context: ExecutionContext): string | undefined {
    const request = context.switchToHttp().getRequest();
    const jwt = request.headers['authorization'] || '';
    const httpAdapter = this.httpAdapterHost.httpAdapter;
    const isHttpApp = httpAdapter && !!httpAdapter.getRequestMethod;

    const cacheMetadata = this.reflector.get(
      CACHE_KEY_METADATA,
      context.getHandler()
    );
    if (!isHttpApp || cacheMetadata) {
      return `${cacheMetadata}_${jwt}`;
    }

    if (httpAdapter.getRequestMethod(request) !== 'GET') {
      return undefined;
    }
    return httpAdapter.getRequestUrl(request) + '_' + jwt;
  }
}